1  # Copyright (C) 2002-2006 Python Software Foundation
       2  # Author: Barry Warsaw
       3  # Contact: email-sig@python.org
       4  
       5  """Base class for MIME type messages that are not multipart."""
       6  
       7  __all__ = ['MIMENonMultipart']
       8  
       9  from email import errors
      10  from email.mime.base import MIMEBase
      11  
      12  
      13  class ESC[4;38;5;81mMIMENonMultipart(ESC[4;38;5;149mMIMEBase):
      14      """Base class for MIME non-multipart type messages."""
      15  
      16      def attach(self, payload):
      17          # The public API prohibits attaching multiple subparts to MIMEBase
      18          # derived subtypes since none of them are, by definition, of content
      19          # type multipart/*
      20          raise errors.MultipartConversionError(
      21              'Cannot attach additional subparts to non-multipart/*')